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VizieR

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J/AJ/131/2478/table4 M31 and M33 UBVRI photometry (Massey+, 2006)
M31 Catalog (371781 rows)
  recno=127975
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ColumnValue  Explain   (UCD)
_RAJ200000 42 19.8300 "h:m:s" Right ascension (FK5, Equinox=J2000.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.ra)
_DEJ2000+40 56 48.000 "d:m:s" Declination (FK5, Equinox=J2000.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.dec)
_RAB195000 39 35.8071 "h:m:s" Right ascension (FK4, Equinox=B1950.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.ra)
_DEB1950+40 40 22.128 "d:m:s" Declination (FK4, Equinox=B1950.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.dec)
_Glon121.0786718 deg Galactic longitude (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.galactic.lon)
_Glat-21.8923079 deg Galactic latitude (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.galactic.lat)
127975recno 127975  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)
n_LGGS   S indicates that spectroscopic data are available in table8 (meta.ref.url)

LGGSJ004219.83+405648.0  (i) LGGS designation, JHHMMSS.ss+DDMMSS.s (meta.id;meta.main)
Vmag21.559 mag Johnson V magnitude (phot.mag;em.opt.V)
e_Vmag 0.017 mag V error (stat.error;phot.mag;em.opt.V)
B-V 0.365 mag Johnson B-V magnitude (phot.color;em.opt.B;em.opt.V)
e_B-V 0.025 mag B-V error (stat.error;phot.color;em.opt.B)
U-B 0.302 mag Johnson U-B colour index (phot.color;em.opt.U;em.opt.B)
e_U-B 0.030 mag U-B error (stat.error;phot.color;em.opt.U)
V-R 0.235 mag Kron-Cousins V-R colour index (phot.color;em.opt.V;em.opt.R)
e_V-R 0.026 mag V-R error (stat.error;phot.color;em.opt.V)
R-I 0.211 mag Kron-Cousins R-I colour index (phot.color;em.opt.R;em.opt.I)
e_R-I 0.019 mag R-I error (stat.error;phot.color;em.opt.R)
nV 9  Number of V measurements (meta.number)
nB 9  Number of B measurements (meta.number)
nU 7  Number of U measurements (meta.number)
nR 9  Number of R measurements (meta.number)
nI 9  Number of I measurements (meta.number)
SpType   MK Spectral Type (if available) (src.spType)
r_SpType   References for spectal type, in refs.dat file (meta.ref;pos.frame)
RAJ200000 42 19.83 "h:m:s" (i) Right ascension (J2000) (pos.eq.ra;meta.main)
DEJ2000+40 56 48.0 "d:m:s" (i) Declination (J2000) (pos.eq.dec;meta.main)
  
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